Synthesis and characterization of LRE1+xBa2-xCu3Oy (LRE: Nd, Eu, Gd, NEG) superconductors: A low oxygen partial pressure (0.05% O2+Ar)

Miryala Muralidhar, M. Murakami

研究成果: Article査読

9 被引用数 (Scopus)

抄録

We have investigated the effect of low oxygen partial pressure (pO2 of 0.05%) on the microstructure and magnetic properties of NdBa2Cu3Oy, EuBa2Cu3Oy, GdBa2Cu3Oy, and (Nd, Eu, Gd)Ba2Cu3Oy. The heat treatment profiles for the melt processes were determined according to the peritectic decomposition temperature obtained by thermal analysis. All the samples showed relatively high Tc in the range of 93.6-96.1 K. Optical and scanning electron microscopy showed that in the Gd-123 matrix the secondary phase particles formed sub-micron-sized bundles. The scaling study of the normalized volume pinning forces showed that ΔTc type pinning is dominant in all the samples. The Gd-123 sample exhibits the highest zero-field critical current density of 88 000 A cm-2 at 77 K for the H ∥c-axis, while the highest secondary peak Jc of 65 000 A cm-2 was achieved in Nd123 at 1 T and 77 K for the H ∥c-axis.

本文言語English
ページ(範囲)683-687
ページ数5
ジャーナルSuperconductor Science and Technology
15
5
DOI
出版ステータスPublished - 2002 5月 1
外部発表はい

ASJC Scopus subject areas

  • セラミックおよび複合材料
  • 凝縮系物理学
  • 金属および合金
  • 電子工学および電気工学
  • 材料化学

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